> Windows 1.01

Release Date: 20 November 1985

> Windows 2.0

Relase Date: 9 December 1987

> Windows 2.1x

Release Date: 27 May 1988

> Windows 3.0

Release Date: 22 May 1990

> Windows 3.11

Release Date: 6 April 1992

> Windows 95

Release Date: 24 August 1995

> Windows 98 (Codename: Memphis)

Release Date: 25 June 1998

> Windows 2000 Profesional

Release Date: February 17, 2000

> Windows ME (Codename: Millenium)

Release Date: September 14, 2000

> Windows XP

Release Date: October 25, 2001

> Windows Vista (Codename: LongHorn)

Release Date: January 30, 2007

> Windows 7

Release Date: October 22, 2009